Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec59cc8027f711d6…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 18:56:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: eb3def8a4f798921d9ddfa75a15af5c5 SHA-1: e8a5e3dd3b21889e66dc6512de0c59eba0b32d4c SHA-256: ec59cc8027f711d6d33ed3665ca4b14eec5ebd87a9edc8aa1dc4fd9de0f75d38
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one identified as a known malicious redirector. The document body and heuristics suggest a lure for game hacks or free currency, likely a phishing or scam attempt. The primary malicious URL identified is http://netcdn.tw/app/431946152/robux-no-human-verification-game-hack, which is used in a redirection chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/robux-no-human-verification-game-hack In PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/app-free-robux-pc_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/how-to-hack-roblox-without-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-robux-hack-mega_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/avatar-de-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-scripts-download-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/get-old-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-roblox-hair-boy-rainbow_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-tix-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-roblox-app-for-android_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/new-hack-for-roblox-2021-november_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/roblox-pants-black-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-custom-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.iaiqi.ac.id/repository/free-robux-no-verification-2021-no-download_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D9E 22660 bytes
SHA-256: 30ac5ef11e5985bece88872459c1b8f1bf68ea25ac8d59805aba62c2bdf35647
font_01_sfnt_off00005fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FEF 19168 bytes
SHA-256: f84039c9361d4f9d97108524e2d84d99e94a3822b4246e645743a6f7b891171e

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